Comparison between the UK DVD by Universal (BBFC 18 / R-Rated) and the uncut US DVD by Universal (Unrated).

There are 4 differences adding up to 2 minutes and 3.5 seconds:

1 cut scene = 5 seconds.
1 alternative cut = 118.5 seconds.
2 alternative scenes = No time difference.

The differences between the R-rated and the unrated version are minor and irrelevant ones. For everyone who is content with the R-rated, the UK DVD will suffice. In Germany, the uncut R-rated version has only been released on VHS so far.

2 min.
The scene in which Barb does a striptease on stage and is being splashed all over with water is much longer in the unrated version. Additionally, there are some shots of the cheering crowd interspersed. As an alternative, the shot of a customer was inserted in the R-rated version. In the unrated version, this shot is presented a moment later.
R-Rated: +1.5 sec.
Unrated: 120 sec.

R-Rated

Unrated

2 min.
A shot of the customer and two shots of the stripping Barb.
5 sec.

12 min.
In the R-rated version, there is a closer shot of the singer, while the unrated version shows various shots of dancing lesbians.
No time difference

R-Rated	Unrated

12 min.
Again there is alternative footage in both versions. In the R-rated version there is another shot of the singer and shots of the dancing lesbians, which were seen in the unrated version before. In the unrated, however, different shots of several lesbians, some of them half-naked, can be seen.
No time difference

R-Rated	Unrated